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18 December, 23:38

4) Suppose y varies directly with x, and y = 7 when x = 2. Find y when x = 21.

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  1. 19 December, 01:15
    0
    73.5

    Step-by-step explanation:

    y=kx

    where k is a constant

    y=7

    x=2

    7=2k

    k=3.5

    what about when x=21

    y=3.5*21

    y=73.5
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